Fabio, You are so deep, I really enjoy your comments.. Better then "Great shott congrats" Where is your image for the today ? Didn't do your work today???
not so sure about the metallic 'twilight' effect, structures and details of this rock would maybe be presented better in oversharpened b&w? nevermind, once a again, a great still, worth to contemplate and meditate about: the bones of the earth, as rocks were called in the taoist traditions in china: here we can see, why : a marrow bone of the earth in the open :)